/*
 * Copyright 2024 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package androidx.compose.mpp.demo.bugs

import androidx.compose.foundation.gestures.detectTransformGestures
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.material3.Text
import androidx.compose.mpp.demo.Screen
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.setValue
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.geometry.Offset
import androidx.compose.ui.input.pointer.pointerInput
import androidx.compose.ui.unit.dp

val TransformGesturesBug = Screen.Example("TransformGestures") {
    TransformGestures()
}

@Composable
fun TransformGestures() {
    var lastCentroid by remember { mutableStateOf(null as Offset?) }
    var lastPan by remember { mutableStateOf(null as Offset?) }
    var lastZoom by remember { mutableStateOf(null as Float?) }
    var lastRotation by remember { mutableStateOf(null as Float?) }
    Column(
        modifier = Modifier
            .fillMaxSize()
            .pointerInput(Unit) {
                detectTransformGestures { centroid, pan, zoom, rotation ->
                    lastCentroid = centroid
                    lastPan = pan
                    lastZoom = zoom
                    lastRotation = rotation
                }
            },
        verticalArrangement = Arrangement.spacedBy(20.dp, Alignment.CenterVertically)
    ) {
        Text("Centroid: $lastCentroid")
        Text("Pan: $lastPan")
        Text("Zoom: $lastZoom")
        Text("Rotation: $lastRotation")
    }
}